CN102563407B - Luminaire - Google Patents

Abstract

A luminaire includes a socket, a radiating member, and a reflecting member. The socket is adapted for loading a lamp unit therein. The lamp unit loaded in the socket contacts the radiating member. The reflecting member is sandwiched and fixed between the socket and the radiating member.

Description

lighting equipment

technical field

Embodiments of the present invention relate to a lighting fixture including a radiator.

Background technique

Conventionally, recessed lighting fixtures such as downlights are installed by embedding the main body of the fixture body into an embedding hole provided on a ceiling or the like. The body part of the appliance body is often formed in a cylindrical shape with the same diameter, and a socket is arranged on the upper part of the body part, and a light source detachably attached to the socket is accommodated in the body part.

However, when the light source of the embedded lighting fixture is an incandescent bulb, the heat dissipation performance of the lighting fixture is not very required, but especially in the case of a lamp device using a light emitting diode (Light Emitting Diode, LED) element, In order to suppress the temperature rise of the LED element, it is necessary to ensure sufficient heat dissipation performance of the lighting fixture. Furthermore, in order to ensure the heat dissipation performance of the lighting fixture, simply adding a heat dissipation structure to the fixture main body will complicate the assembly structure, resulting in a decrease in assemblability.

Contents of the invention

The problem to be solved by the present invention is to provide a lighting fixture capable of improving heat dissipation performance and further improving assembling property.

A lighting fixture according to an embodiment includes: a lamp holder, a radiator, and a reflector. The lamp socket mounts the lamp device. The lamp device mounted on the lamp socket contacts the heat sink. The reflector is fixed by being sandwiched between the lamp holder and the radiator.

Since the lamp device mounted on the lamp holder is in contact with the radiator, the heat of the lamp device can be efficiently conducted to the radiator, thereby improving the heat dissipation performance; furthermore, since the reflector is clamped between the lamp holder and the radiator , so they can be easily assembled into one body, so that the assemblability can be improved.

Description of drawings

FIG. 1 is a cross-sectional view showing a lighting fixture according to an embodiment.

Fig. 2 is a perspective view of an exploded state of the lighting fixture according to the embodiment.

Fig. 3 is a perspective view of an assembled state of the lighting fixture according to the embodiment.

Fig. 4 is a perspective view of a lamp device of a lighting fixture according to an embodiment.

[explanation of the symbol]

11: Lighting fixtures

12: Department to be set

13: Buried hole

21: Light device

22: frame

23: lampshade

24: shell

25: lamp head component

26: lamp head

27: lamp foot

28, 67: wedge groove

28a, 67a: Longitudinal groove

28b, 67b: horizontal groove

29, 68: Wedge

30: heat sink

31, 56: mark

40: reflector

41: appliance body

42: lamp holder

43: radiator

44: Install the spring

45: Mounting plate

46, 47: terminal board

49: Main body

50: Flange

51: Upper surface part

52: Zhou Facial

53: Fitting hole

54: Mounting hole

55: wiring hole

57: Convection forming part

59: Lamp holder body

60: annular part

61: inner cylinder

62: outer cylinder

63: Through opening

64, 81, 84: Screws

65: Raised

66: Connection slot

70: base

71: Fins

72a: Mounting surface

72b: contact surface

73: protrusion

74: Gap

75: Inclined part

76: Installation department

77: Mounting hole

79: support piece

80: abutment piece

82: Hook part

85: Terminal board mounting part

d1: the maximum outer diameter of the radiator

d2: The maximum outer diameter of the body

d3: The outer diameter of the upper part of the main body

Detailed ways

One embodiment will be described with reference to the drawings.

As shown in FIG. 1 , the lighting fixture 11 is a recessed lighting fixture such as a downlight, and is installed in a state of being buried in a circular embedding hole 13 provided in an installation portion such as a ceiling. 12 on.

As shown in FIGS. 1 to 4 , for the lighting fixture 11 , a flat-shaped lamp device 21 is used. The lamp device 21 has a cylindrical frame 22, and a globe 23 for emitting light to the outside is attached to the lower surface of the frame 22. As shown in FIG.

The housing 22 has a cylindrical case 24 and a cylindrical base member 25 attached to the center of the upper surface of the case 24 . The cap portion 26 is constituted by the upper surface side of the casing 24 and the cap member 25 protruding from the upper surface of the casing 24 . The frame body 22 is made of, for example, insulating synthetic resin, and the base member 25 is made of, for example, metal such as aluminum die casting, ceramics, or a resin excellent in thermal conductivity.

Inside the frame body 22, a light emitting module (module) and a lighting circuit are accommodated. The light emitting module forms a light emitting part on a substrate, and the light emitting part has a semiconductor such as an LED element or an electroluminescence (EL) element. light emitting element. The lighting circuit turns on the semiconductor light emitting element. The substrate of the light emitting module is mounted in close contact with the inner surface of the cap member 25 and thermally bonded.

A plurality of lamp pins (lamp pins) 27 for power supply, earth (earth) and dimming signal etc. protrude vertically from the upper peripheral portion of the housing 24 .

A plurality of key grooves 28 (key grooves) are formed on the peripheral surface of the cap member 25 . Each wedge groove 28 is formed in a substantially L-shape having a vertical groove 28a connected to the upper surface of the cap member 25 and formed along the vertical direction, and a transverse groove 28b formed in the cap member. The lower part of 25 is formed along the circumferential direction of the cap member 25 . Furthermore, a plurality of wedges 29 are protrudingly formed between the plurality of wedge grooves 28 on the peripheral surface of the base member 25 . Furthermore, a heat sink (sheet) 30 is attached to the upper surface of the cap member 25 .

The lampshade 23 is made of translucent synthetic resin or glass, and a triangular mark 31 is provided at one place on the lower surface to indicate the installation position toward the lighting fixture 11 .

In addition, the lamp device 21 of the present embodiment is a chip-on-board (COB) light-emitting module in which a plurality of LED elements are mounted on a substrate, and the input power (power consumption) of the light-emitting module is 20W to 20W. 25W, the full beam is 1100lm ~ 1650lm.

Moreover, as shown in FIGS. 1 to 3 , the lighting fixture 11 includes: a fixture body 41 serving as a reflector 40 ; a lamp holder 42 disposed inside the fixture body 41 ; and a radiator 43 disposed on the top of the fixture body 41 a plurality of mounting springs 44 installed on the peripheral surface of the radiator 43; a mounting plate 45 mounted on the top of the radiator 43; and terminal boards 46, 47 mounted on the mounting plate 45.

The tool body 41 is made of metal, for example, and has a cylindrical body portion 49 and an annular flange portion 50 protruding from the lower end of the body portion 49 to the periphery. The main body portion 49 has an upper surface portion 51 and a peripheral surface portion 52 extending downward from the peripheral portion of the upper surface portion 51 , and opens downward. A circular fitting hole 53 is formed in the center of the upper surface portion 51 , and a plurality of mounting holes 54 are formed in a peripheral portion of the upper surface portion 51 . In one place of the main body portion 49 , a wiring hole 55 is formed straddling the upper surface portion 51 and the peripheral surface portion 52 . At one place on the inner peripheral surface of the main body portion 49 , a triangular mark 56 indicating the mounting position of the lamp device 21 is provided.

The diameter of the main body portion 49 is formed smaller than the diameter of the embedding hole 13 , and the diameter of the flange portion 50 is formed larger than the diameter of the embedding hole 13 . The peripheral surface portion 52 of the main body portion 49 is inclined such that the diameter on the lower side is the largest, and the diameter on the upper side is gradually reduced. On the outer surface of the peripheral surface portion 52 of the body portion 49 is formed a convection forming portion 57 capable of forming convection of air from the lower surface side toward the upper surface side of the radiator 43 .

Furthermore, the socket 42 includes: a socket body 59 , which is made of, for example, insulating synthetic resin and formed in a ring shape; and a plurality of terminals (not shown) arranged in the socket body 59 .

The socket body 59 is formed with an annular portion 60 , an inner cylinder 61 protruding upward from the inner periphery of the annular portion 60 , and an outer cylinder protruding downward from the outer periphery of the annular portion 60 . 62. An insertion opening 63 through which the base member 25 of the lamp device 21 is inserted is formed inside the inner cylinder 61 , and the upper portion of the case 24 of the lamp device 21 can be fitted inside the outer cylinder 62 .

On the annular portion 60 , a plurality of bosses 65 protruding upward are formed with a plurality of screws 64 for fixing the lamp holder 42 , the appliance body 41 and the radiator 43 . Furthermore, a plurality of connection grooves 66 into which the lamp pins 27 of the lamp device 21 are inserted are formed in the shape of long holes along the circumferential direction of the annular portion 60 .

A plurality of wedge grooves 67 are formed on the inner peripheral surface of the inner cylinder 61 . Each wedge groove 67 is formed in a substantially L-shape having a vertical groove 67a connected to the annular portion 60 and formed along the vertical direction, and a horizontal groove 67b formed in the inner cylinder 61. The upper portion is formed along the circumferential direction of the inner cylinder 61 . Furthermore, a plurality of wedges 68 are protrudingly formed between the plurality of wedge grooves 67 on the inner peripheral surface of the inner cylinder 61 . The wedge grooves 67 and wedges 68 correspond to the wedges 29 and the wedge grooves 28 of the lamp device 21 , so that the lamp device 21 can be detachably attached to the lamp socket 42 .

Each terminal is arranged on the upper side of each connection groove 66 . The lamp device 21 is installed in the lamp socket 42 , and each terminal is electrically connected to each lamp pin 27 inserted into each connecting slot 66 .

Furthermore, the radiator 43 is formed of a material such as metal such as die-cast aluminum, ceramics, or resin excellent in heat dissipation, for example. The radiator 43 has a cylindrical base 70 and a plurality of fins (radiation fins) 71 protruding radially outward from the periphery of the base 70 .

On the peripheral portion of the base portion 70 and the lower surface of the fins 71 , an attachment surface 72 a to which the upper surface portion 51 of the tool body 41 abuts and is attached is formed. On the lower surface of the central portion of the base 70 is formed a circular protruding portion 73 that closes the lower surface of the base 70 and protrudes downward from the attachment surface 72a. A planar contact surface 72 b is formed on the lower surface of the protruding portion 73 . By fitting the protruding portion 73 into the fitting hole 53 of the reflector 40 , the radiator 43 and the reflector 40 are positioned. In addition, ribs (not shown) are radially formed inside the base portion 70 .

Between the plurality of fins 71 , gaps 74 open to the outer periphery, lower surface, and upper surface of the radiator 43 are formed. An inclined portion 75 is formed on the outer diameter side upper portion of the fin 71 so as to notch a corner portion. One of the gaps 74 between the fins 71 communicates with the wiring hole 55 of the device main body 41 .

A plurality of mounting portions 76 are formed on the outer side of the base portion 70 of the radiator 43 . Mounting holes 77 in which the screws 64 are screwed are formed at the lower parts of the mounting portions 76 , and the screws 64 fix the lamp holder 42 , the appliance body 41 and the radiator 43 .

In addition, the outer diameter d1 of the radiator 43 is smaller than the maximum outer diameter d2 of the main body 49 of the appliance body 41 and larger than the upper outer diameter d3 of the main body 49 . Therefore, a portion of the fin 71 on the radially outer side protrudes further to the radially outer side than the upper outer peripheral surface of the main body portion 49 . The convection forming part 57 formed on the outer surface of the main body part 49 can form convection of air from the lower surface side toward the upper surface side of the radiator 43 .

Furthermore, the mounting spring 44 includes a metal leaf spring, and has a supporting piece 79 and an abutting piece 80 bent from the lower end of the supporting piece 79 . The upper end of the support piece 79 is fixed to the outer surface of the mounting portion 76 of the heat sink 43 with a screw 81 , and the support piece 79 is arranged along the side surface of the main body portion 49 of the appliance body 41 . The contact piece 80 protrudes to the side of the appliance main body 41 , and a substantially L-shaped hook portion 82 is formed at the front end of the contact piece 80 .

Furthermore, the mounting plate 45 is made of metal, for example, and is fixed by screws 84 in a state of being in contact with the upper surface of the radiator 43 . A terminal board mounting portion 85 protruding laterally from the radiator 43 is formed on the mounting plate 45 , and the terminal boards 46 and 47 are mounted on the lower surface of the terminal board mounting portion 85 . That is, the terminal boards 46 and 47 are arranged at positions away from the heat sink 43 in the lateral direction through the mounting plate 45 .

Furthermore, the terminal board 46 is for a power supply and grounding, and the terminal board 47 is for a dimming signal, and these terminal boards 46 and 47 are connected to the lamp socket 42 by wires not shown. The electric wires pass from the socket 42 through the wiring hole 55 of the device body 41 and the gap 74 between the fins 71 of the radiator 43 to be connected to the terminal boards 46 and 47 .

Next, assembly of the lighting fixture 11 will be described.

Insert the protrusion 73 of the radiator 43 into the fitting hole 53 of the appliance body 41 to position the radiator 43 and the reflector 40; insert the lamp holder 42 into the body part 49 of the appliance body 41; Under the condition that the appliance body 41 is sandwiched between the bodies 43, each screw 64 is threaded into the installation hole 77 of the radiator 43 through the protrusion 65 of the lamp holder 42 and the installation hole 54 of the appliance body 41; These are fixed integrally with the appliance main body 41 sandwiched between the radiator 43 .

When inserting the lamp holder 42 into the main body portion 49 of the appliance body 41, the electric wires from the lamp holder 42 drawn out from the wiring hole 55 of the appliance body 41 to the outside are connected to each terminal board 46, 47 in advance, and the installed The mounting plate 45 of these terminal plates 46 and 47 is fixed to the upper part of the radiator 43 by a plurality of screws 84 .

Each mounting spring 44 is fixed to the side surface of the radiator 43 by each screw 81 .

Then, above the insertion opening 63 of the socket 42, the contact surface 72b of the radiator 43 is exposed and arranged.

Next, installation of the lighting fixture 11 will be described.

The power line, ground wire, and dimming signal line introduced into the embedded hole 13 of the installed part 12 in advance are drawn out from the embedded hole 13 to the bottom of the installed part 12 and connected to each terminal board of the lighting fixture 11 46, 47.

In a state where the abutting piece 80 of each mounting spring 44 is elastically deformed and held along the side surface of the fixture body 41, first, the lighting fixture 11 is tilted so that the terminal board mounting portion of the mounting plate 45 85 and the terminal boards 46, 47 facing upwards, insert the terminal board mounting part 85 of the mounting board 45 and the terminal boards 46, 47 obliquely into the embedded hole 13; The radiator 43 , the body portion 49 of the appliance body 41 , and the mounting springs 44 are inserted into the embedding holes 13 .

When the hook portion 82 of each attachment spring 44 moves above the embedding hole 13 , the holding of each attachment spring 44 is released. As a result, the abutment piece 80 of each mounting spring 44 is expanded to the side of the fixture body 41 by the repulsive force against the elastic deformation, and the abutment piece 80 abuts against the upper edge of the embedded hole 13 to turn the lighting fixture 11 Pull upward, and the flange part 50 abuts against the lower surface of the part to be installed 12, and the installation is completed.

Furthermore, in the lighting fixture 11 of this embodiment, since the maximum outer diameter d1 of the radiator 43 is formed to be smaller than the maximum outer diameter d2 of the main body portion 49 of the fixture body 41, the radiator 43 is less likely to be Even if the cooling body 43 is provided as an obstacle when installing the appliance main body 41 in the embedded hole 13 of the installation part 12 , it is possible to prevent the installation workability from being lowered.

Moreover, when the lighting fixture 11 is detached from the installed portion 12, the lighting fixture 11 is pulled down against the upward tension of each mounting spring 44 on the one hand, so that the contact piece 80 of each mounting spring 44 moved to the bottom of the embedded hole 13 By elastically deforming along the side of the fixture body 41, the main body portion 49 and the radiator 43 of the fixture body 41 are moved below the embedding hole 13, and the lighting fixture 11 is tilted in the same manner as when it is installed. The terminal board mounting portion 85 of the mounting plate 45 and the terminal boards 46 and 47 are moved below the embedding hole 13 .

Next, attachment of the lamp device 21 to the lighting fixture 11 will be described.

Insert the lamp device 21 into the inner side of the body part 49 of the appliance body 41, align the mark 31 displayed on the lamp device 21 with the mark 56 displayed on the inner surface of the body part 49 of the appliance body 41, push up the lamp device 21 and insert Lamp holder 42.

Thus, at first, the cap member 25 of the lamp device 21 is inserted into the insertion opening 63 of the lamp holder 42, and then each wedge 68 of the lamp holder 42 enters the longitudinal groove 28a of each wedge groove 28 of the lamp cap member 25, and the lamp cap member 25 Each wedge 29 enters the longitudinal groove 67a of each wedge groove 67 of the lamp holder 42, and each lamp pin 27 of the lamp device 21 is inserted into each corresponding connecting groove 66 of the lamp holder 42; It abuts against the contact surface 72b of the radiator 43 .

In the state where the lamp device 21 is pressed against the radiator 43, the lamp device 21 is rotated in the mounting direction, whereby each wedge 68 of the lamp holder 42 enters into the horizontal groove 28b of each wedge groove 28 of the lamp cap member 25 and is hooked. , and each wedge 29 of the cap member 25 enters and hooks into the transverse groove 67b of each wedge groove 67 of the socket 42, thereby mounting the lamp device 21 in the socket 42. Furthermore, each lamp pin 27 of the lamp device 21 moves in each connecting groove 66 of the lamp socket 42 , and contacts and electrically connects with each terminal arranged on the upper side of each connecting groove 66 .

When the lamp device 21 is installed, the upper surface of the base member 25 of the lamp device 21 is in close contact with the contact surface 72b of the heat sink 43 via the heat sink 30, so that heat can be efficiently conducted from the lamp device 21 to the heat sink 43.

Moreover, when detaching the lamp device 21 from the lighting fixture 11 , first, the lamp device 21 is rotated in a detachment direction opposite to that at the time of attachment, whereby the wedges 68 of the lamp holder 42 move to the wedge grooves 28 of the cap member 25 . and each wedge 29 of the lamp cap member 25 moves to the longitudinal groove 67a of each wedge groove 67 of the lamp holder 42, and each lamp pin 27 moves in each connecting groove 66 of the lamp holder 42, and deviates from each connecting groove 66 Each terminal arranged on the upper side of the Then, the lamp device 21 is moved downward, whereby each lamp pin 27 is separated from each connecting groove 66 of the lamp socket 42, and the vertical groove 28a of each wedge groove 28 of the lamp cap member 25 is separated from each wedge 68 of the lamp socket 42, and, The wedges 29 of the cap member 25 are separated from the longitudinal grooves 67 a of the wedge grooves 67 of the socket 42 , and the cap member 25 is separated from the insertion opening 63 of the socket 42 , so that the lamp device 21 can be detached from the socket 42 .

Next, lighting of the lamp device 21 will be described.

When the lighting circuit is powered from the power line through the terminal board 46, the terminals of the lamp socket 42, and the lamp pins 27 of the lamp device 21, the lighting power is supplied from the lighting circuit to the semiconductor light-emitting elements of the light-emitting module, and the semiconductor light-emitting elements are turned on. The light emitted by the lighting of the semiconductor light emitting element passes through the globe 23 , and exits through an opening in the lower surface of the device main body 41 .

Moreover, when lighting, the heat generated by the semiconductor light emitting elements of the light emitting module is mainly conducted from the substrate of the light emitting module to the thermally bonded base member 25, and is efficiently conducted from the base member 25 to the closely bonded heat sink through the heat sink 30. body 43, and then dissipate into the air from the surface contained by the plurality of fins 71 of the heat sink 43.

At this time, the convection forming part 57 formed outside the main body part 49 can form convection of the air passing through the gap 74 between the plurality of fins 71 from the lower surface side of the radiator 43 to the upper surface side. Therefore, heat can be efficiently dissipated from the radiator 43 .

Moreover, part of the heat conducted from the lamp device 21 to the radiator 43 is respectively conducted to the fixture body 41 , the plurality of mounting springs 44 and the mounting plate 45 , and then dissipated into the air from these parts.

According to the lighting fixture 11 of the present embodiment constituted as described above, since the lamp device 21 mounted on the lamp socket 42 is in contact with the radiator 43, the heat of the lamp device 21 can be efficiently conducted to the radiator 43, thereby improving thermal performance.

Furthermore, since the maximum outer diameter d1 of the radiator 43 is formed to be smaller than the maximum outer diameter d2 of the main body portion 49 of the appliance body 41, it is difficult for the radiator 43 to be the place where the appliance body 41 is installed on the installed portion 12. The obstruction at the time of embedding in the hole 13 can prevent the fall of installation workability.

Furthermore, the terminal plates 46 and 47 are disposed at positions away from the side of the radiator 43 from the maximum outer diameter portion of the main body 49 by the mounting plate 45 protruding from the radiator 43 to the side of the radiator 43. The terminal plates 46 , 47 and the electric wires connected to these terminal plates 46 , 47 are less likely to be affected by heat from the radiator 43 . As the wires connected to the terminal boards 46, 47, F cables are generally used. The heat-resistant temperature of the F cables is 60° C. to 70° C. The radiator 43 is affected by heat.

Furthermore, since the outer diameter of the radiator 43 is larger than that of the upper part of the main body 49 , the surface area of the radiator 43 is increased, thereby improving the heat dissipation performance of the radiator 43 .

In other words, since the outer diameter of the upper portion of the body portion 49 is smaller than that of the radiator 43 , the surface area of the radiator 43 can be increased, thereby improving the heat dissipation performance of the radiator 43 .

Moreover, the convection forming part 57 formed on the outside of the main body part 49 can form convection of the air from the lower surface side of the radiator 43 toward the upper surface side, so it is possible to efficiently dissipate heat from the radiator 43, thereby improving the performance of the radiator. thermal performance.

Moreover, since the plurality of fins 71 of the radiator 43 are arranged radially, the compactness of the radiator 43 can be ensured and a high heat dissipation effect can be obtained.

Furthermore, since the reflector 40 serving also as the fixture body 41 is fixed between the lamp socket 42 and the radiator 43 , they can be easily integrated with, for example, screws 64 , and assemblability can be improved.

Furthermore, on the radiator 43, since the contact surface 72b that the lamp device 21 contacts is provided to protrude from the mounting surface 72a, and the reflector 40 is sandwiched between the mounting surface 72a and the lamp socket 42, the reflector can be eliminated. 40 and the contact surface 72b to be flush with each other, so that the lamp device 21 can be reliably brought into close contact with the contact surface 72b.

Furthermore, the heat dissipation body 43 and the reflector 40 can be positioned by the protruding portion 73 provided on the heat dissipation body 43 .

Moreover, on the outside of the base portion 70 of the radiator 43, a plurality of fins 71 and mounting portions 76 for mounting the lamp holder 42 are provided, so that the lamp device 21 can be reliably contacted with the base portion 70, and the thermal efficiency of the lamp device 21 can be improved. Conducted to the radiator 43, so that the heat dissipation performance can be improved.

Moreover, since a plurality of mounting springs 44 are installed on the radiator 43, the mass of the constituent elements of the luminaire 11 can be increased by these mounting springs 44, and the radiator 43 positioned on the upper part of the appliance body 41 can be positioned relatively relative to the mounted radiator 43. The part 12 is stably supported. Furthermore, since heat can be efficiently conducted from the radiator 43 to the plurality of attachment springs 44 , the effect of heat dissipation into the air can also be obtained from the plurality of attachment springs 44 , and the heat dissipation performance of the lighting fixture 11 can be improved.

Moreover, since the gap 74 between the wiring hole 55 of the appliance body 41 and the fin 71 of the radiator 43 is communicated, the wiring hole 55 of the appliance body 41 and the fins of the radiator 43 can be used from the lamp socket 42. The gap 74 between 71 is used to wire the wires connecting the terminal boards 46 , 47 and the lamp socket 42 . Furthermore, the temperature-raised air inside the main body portion 49 can be exhausted through the wiring hole 55 .

Furthermore, since the mark 31 is provided on the lamp device 21 and the mark 56 is provided on the appliance body 41 , the lamp device 21 can be easily aligned and inserted into the position of the lamp holder 42 accurately.

In addition, the lighting fixture 11 may use a cooling fan (fan) which forcibly forms a flow of air with respect to the cooling body 43 to effectively dissipate heat. At this time, the power supply of the cooling fan only needs to be taken from the lamp socket 42 or the terminal board 47 for the dimming signal.

Although some embodiments of the present invention have been described, these embodiments are merely examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope or spirit of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

Claims (4)

1. A lighting fixture, characterized in that it comprises: A lamp device comprising: a cylindrical housing; a lamp head protruding from the center of the upper surface of the housing; and a plurality of lamp pins protruding from the peripheral portion of the upper surface of the housing; The lamp holder is used to install the lamp device, and the lamp holder includes: a ring-shaped part provided with an insertion opening through which the lamp head is inserted; a plurality of connecting grooves are arranged in the ring-shaped part and are the lamp pins are inserted into; a plurality of holes are arranged in the annular part; The radiator is mounted on the lamp socket by screws inserted through the plurality of holes, and the lamp head of the lamp device inserted in the insertion opening of the lamp socket contacts the lamp socket. heat sink; and The reflector is fixed by being sandwiched between the lamp socket and the heat sink, and the reflector includes a hole that is larger than the insertion opening through which the lamp head is inserted and smaller than the annular portion. Open your mouth. 2. The lighting fixture according to claim 1, characterized in that: A mounting surface and a contact surface are provided on the radiator, the reflector is installed on the mounting surface, and the reflector is sandwiched between the mounting surface and the lamp holder, and the contact surface is larger than the lamp holder. The mounting surface protrudes and contacts the lamp head of the lamp device. 3. The lighting fixture according to claim 1, characterized in that: A protruding portion for positioning the reflector is provided on the radiator. 4. The lighting fixture according to claim 1, characterized in that: The radiator has: base; a plurality of fins disposed on the outside of the base; and The installation part provided on the outer side of the base and installed with the lamp socket.